Circuit-interrupter.



A. M. WIDERBERG. CIRCUIT INTRRUPTER.v APPLICATION man Nov.11, 1911.

Patented 1111111919'.

2 SHEETS-SHEET 1.

Juventa/L A-MW7L'ere7L/g/ ,A. M. WIDEBBERG.

cmcul |NTERRUPTER.

APPLICATION FILED NOV-1?. |911.

1,290,449. Patented Jan. 7,1919'.

- 2 SHEETS-SHEET 2. l

y @1t/bow ma UNITED STATES PATENT oFFIcE. ADPIPH MARTIN WIDEBBER, W'ORCES'llE-R, M-ASSACHUSE-TTS. I

Specification of Letters Patent.

l i Patented Jan. "I, 1219.

application 'mea november 17, 1917. seran No. 202,576.

i 15 by an unauthorized person, the improved device embodying means .controlled by a rotatin part of the. driving mechanism ofthe ve icle suchl as the drive shaft,whereby an alarm may be sounded intermittently.

A further object of the invention is to -provide a device of the character referred to, the construction of which is adapted to be easily and expeditiously applied to ma# chines now in use.

With the above and other objects in view, the invention consists inthe novel construcl tion, combination and arrangement of parts, herein fully described,v illustrated and claimed.

In the accompanying drawings Figure 1 is a side elevation of a sufficient ortion of a motor vehicle to illustrate the improved alarm in its applied relation thereto.

Fig. 2 is a view taken at right angles to Fig. 1, showing the drive shaft in cross section.

Fig. 3 is a. verticall section through the alarm device taken in line with the drive 40 shaft of a motor vehicle.

Fi 4 is an elevation of the stationary mem r of the device.

Fig. 5 is a similar view of the rotary member thereof.

hicles comprises a stationary or non-rotary member 1, and a rotary member 2 which 1s desi ed to be fastened to the drive shaft 3 of t e motor vehicle so as to be turned thereby. The member 1 has a screw thread-A The improved interrupter for motor ve port lsecuredby fastening means 6 to the ottom of the vehicle floor.

The main body ofthe member 1 comprises a body 7 of non-conducting material such aS fiber, the same being surrounded by a rein- -forcingband 8 of metal. Secured to one side of the non-conducting body 7 is a race -body 7 is split along the diametrical line 12;

also the band 8, vthe latterbeing formed with ears 13 through. which is inserted suitable fastening or clamping means 14.

The rotating mem er 2 also comprises a body 15`of ber, a race 16 and a surrounding reinforcing band 1-7. All the parts 15, 16

and 17 are split along diametrical lines in the same manner as described in connection with the parts of Fig. 4 and have the same pur ose Which is to admit of the application of t e member 2 to the drive shaft 3. Lugs or ears 18 on the member 2 are clamped together by fastening means 19 and also tightly clamped in relation to and upon the ldrlve shaft 3. The member 1 is also proi with the exception of the hanger- 4 and the means for connecting the same with the vehicle floor are inclosed in the diametrically split casing 23 as shown in'Figs. 1 and 2, said casingl being formed in two similar s ections havmg ears 24 through which are 1nserted bolts or other fasteners 25. Dust, dirt and foreign matter are thus excluded from the working parts of the device.

From a source of electrical energy such as a battery 25', a circuit wire 26 extends to a hidden switch 27 which may be located at any place to the machine which may be selected by the operator or owner. From the switch 27 awire 28r leads toa brush 29 which extendsthrough an" arm 30 ofthe nonrotary member 1. The rotary member 2 carries a metal plug 3l against which the brush 29-4is:v adapted to wipe` once in each rotation of the shaft3 and the member 2'. The plug 31 lies in Contact withuanothervfplug 32 extending at a right angle to the plug 31 and projectingffrom` th'efinner face of the rotary member so as to contact withthe projecting portion of another metal plug 33 which extends through the member 1 and is threaded to receive a clamping nut 34 for a wire 35 which extends to an alarm 36 such as a bell or gongthat may be located in a suitable cage under the car body if so desired. A wire 37 extends from the Wire 35'to the a1arm"36. Y

Fromthe foregoing description taken in connection with the accompanying drawings it will now be understood that when the hidden switch'27`is closed, as the shaft 3 rotates, Contact is made between the brush 29 and'thermetal plug 31l and between the plugs 32 and; 33. This causes a current to pass through and sound the alarm 36 once `in each-revolutionrof the shaft 33. The

alarm 36 will have some distinguishing chaiL 'acteristic so as to advise persons in the vicinity of thc machine that an unauthorized person is attempting to operate the same.

An electric alarm circuit interrupter for motor vehicles, comprising in combination, a diametrically splitand substantially cylindrical casing, a non-rotary member, also diametrically split, adapting it to embrace a motor vehicle shaft, said stationary member carrying a laterally projecting electric contact, a diametrically split rotary member adapted to be ixedly mounted upon said shaft and having a laterally projecting electric contact adapted td coperatewith the first named contact to close a circuit in each revoluion of said shaft, a brush carried by said non-rotary member, a contactfor said brush carried by the rotary member and electrically connected t0 the first named contact of Said rotary member, and a telescoping hanger supporting said casing and nonrotary member, said hanger adapted to be secured to a part of the vehicle.

In testimony whereof I, aiix my signature.

ADOLPH MARTIN WIDERBERG. 

